How to Calculate the Number of Atoms in Oxygen Sample

How can we calculate the number of atoms in a sample of oxygen based on its mass?

To calculate the number of atoms in a sample of oxygen based on its mass, we need to follow a series of steps involving conversion of mass to moles and then applying Avogadro's Number.

Calculation of Number of Atoms in Oxygen Sample:

First, we need to convert the mass of the oxygen sample to moles using the molar mass of oxygen (O).

The molar mass of oxygen (O) is approximately 16 grams per mole.

Given mass of oxygen sample = 5.06 grams

Number of moles of oxygen = Mass of oxygen / Molar mass of oxygen

Number of moles of oxygen = 5.06 g / 16 g/mol = 0.32 moles

Next, we need to apply Avogadro's Number to convert moles of oxygen to number of oxygen atoms.

Avogadro's Number is approximately 6.022 x 10^23 atoms per mole.

Number of atoms of oxygen = Number of moles of oxygen x Avogadro's Number

Number of atoms of oxygen = 0.32 moles x 6.022 x 10^23 atoms/mol = 1.90 x 10^23 atoms

Therefore, the sample of oxygen with a mass of 5.06 grams contains approximately 1.90 x 10^23 atoms of oxygen.

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